public static bool Vld_UserName(global::ENTITY.CusUsers userlogin)
        {
            string sql = @"select customerid from CusUsers where Customername =@Customername";

            SqlParameter[] para = new SqlParameter[] {
                new SqlParameter("@Customername", SqlDbType.VarChar)
            };
            para[0].Value = userlogin.Customername;
            return((DBHelp.ExecuteScalar(sql, para) != null) ? true : false);
        }
        public static bool ulogin(global::ENTITY.CusUsers userlogin)
        {
            string sql = @"select customerid from CusUsers where Customername =@Customername and customerpwd =@customerpwd and IsCusAdmin=@IsCusAdmin";

            SqlParameter[] para = new SqlParameter[] {
                new SqlParameter("@Customername", SqlDbType.VarChar),
                new SqlParameter("@customerpwd", SqlDbType.VarChar),
                new SqlParameter("@IsCusAdmin", SqlDbType.Int)
            };
            para[0].Value = userlogin.Customername;
            para[1].Value = userlogin.customerpwd;
            para[2].Value = userlogin.IsCusAdmin;
            return((DBHelp.ExecuteScalar(sql, para) != null) ? true : false);
        }